Goodwill and Other Intangibles and Servicing Rights - Mortgage servicing rights (Details) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Mortgage servicing rights asset:
MSR asset at beginning of year	$ 13,636	$ 10,230
Capitalized MSR	886	4,329
MSR asset acquired	0	1,322
Amortization during the period	(696)	(2,245)
MSR asset at end of period	13,826	13,636
Valuation Allowance:
Valuation allowance at beginning of year	(1,200)	(1,000)
Additions	0	(500)
Reversals	600	300
Valuation allowance at end of period	(600)	(1,200)
MSR asset, net	13,226	12,436
Fair value of MSR asset at end of period	16,621	15,599
Residential mortgage loans serviced for others	$ 1,593,010	$ 1,583,577
Net book value of MSR asset to loans serviced for others	0.83%	0.79%